I love this toilet. It has a little door on the lid that has two buttons. One is a quick clean and the other is a bit longer, more thorough clean. You choose which one, press the button, and a cartridge releases cleaning solution, swirls it around the basin, and self cleans!  It then flushes itself!  The self clean feature is battery operated. The cartridges are reasonably priced.   I use the self clean feature about twice a week and I haven’t scrubbed the toilet with a brush since I got it- a little over a year ago!  I have told everyone about this toilet. I will be getting another on in the master bath this year.